FYI: Comic-Con just posted this on their official site:

The deadline for refunded badges was June 20, 2011. We will announce via our website, Facebook, Twitter and RSS feed when those refunded badges will go on sale. This is a soft opening so the announcement will be made on the day registration opens with about one hour prior notice.

At this time we expect to have 1,500 4-day badges available for purchase.

A number of attendees have brought to our attention the fact that many people purchasing 4-day badges are not planning to attend all four days, while many people who want to attend all four days are forced to buy single-day badges at a higher price. In response, Comic-Con will no longer be offering a discount for 4-day badge purchases. Instead, a 4-day badge and four single-day badges will be the same price. We hope that this change will encourage people to purchase only the days they will actually be attending, leaving additional badges for others who want to attend Comic-Con.

A 4-day adult badge without Preview Night will be sold at the non-discounted rate of $137 that includes a $6 reprocessing fee. Junior, Senior, and Military 4-day badges without Preview Night will be sold at the non-discounted rate of $68 each. You may purchase up to TWO 4-day badges only.

Single-day badges will be available at a later time.